Carbureter



J. J. TRACY AND L. H. MORSE.

CARBURETER.

APPLICATION FILED APR. 23, 1911.

Patented Sept. 20, 1921.

I an l and? Ewes I 7Fvcy Law/and: b. Mar

TTZOZJVEJFU- form the charge proper.

UNITED; TA ES" J. TRAGY'ALND4LAWRENCE1H..MORSB,E on CLEVELAND, ASSIGNORITO-SAID TRACY, 1 V

PATENT oFFlcEQ OHIO; SAID MORSE QARBUBETER.

V Specification of Letters Patent. Patented Sept. 20,1921.

A'ppllcation filed.Apri1.23, 1917. Serial No. 163,770.

To aZZ whmnitmay concern:

Be it known thatwe, JAMES J; TRAoY and LAWRENCE Monsn, both citizens of the United. States, and residents of Cleveland, county of" Cuyahoga, and" State of Ohio, respectively, have jointly invented anew and useful-Improvement in'Carbureters, of which the following is a specification; the principle ofjthe'invention being herein explained and the best mode in whichwe have contemplated applying {that principle, so as to distinguish it from other inventions. The present improvements, relating as indicated to carbureters, have as their object' the provision of a carbureterjwherein the air friction, or flow of air drawn through the device by the'suction of" the engine, will serve to open and regulate, not only. such flow of air, but also the flow ofthe hydrocarbon fuel, which-is mixed therewith'to v 'A further object is the incorporation, directly in the carbureter, of means for heating the liquid fuel so that, particularly in'the caseofthe heavier/hydrocarbons; such fuel will Yvaporize more readily when admixed'with the air.- to form the charge. To the accomplishment of the foregoing. and related ends, said invention, then, consists ofthe means hereinafter fully .described and particularly pointed out in the claims.

- --The annexed drawing and the following description set forth in detail certain mechani sm embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said'annexed drawing J I.

Fig. 1"is 'a' central vertical section of, the carbureter;. Fig.12. is; a transverse section thereof, taken on .theplane indicated by theline" 2 -2," Fig; 1; Fig. 3 is a central vertical section of theflower portion of such carbureter, .showinglga modification in-eonstruction; andjFigAai's; a broken side elevation of the carbureter ona smaller scale. Referring firstjto the construction of the carbureter proper, the body of'thedevice willbe seen to consist of atubular casingl, preferably in the ;form of an elbow, provided with an air inlet opening ,2 ,at approximatelyright' anglesto the outlet" opening 3', whichis connected, ofcourse, to the engine manifold,-as need not be further-explained. The throttle consists of" a butterfly valve 45 ofthe usual constructionion' a spindle 5 mounted in such outlet opening, and provided with suitable means for operating the same from the dash, in the'case of an automobile, or elsewhere as most convenient. Of suchoperating means, the only parts shown- (see Fig. 4) consist of a lever 6 secured toone end of the shaft 5an'd a connecting rod 7 f and leads from this lever to any desired pointfor the purpose of operation. The movement .of'suchlever is limited by a stop 8 on'the outside of'thecasi'ng,

when the valve is inv closed position.

are radial slots 16 through which the fuel. as

it escapes from the nozzle is adapted-to be discharged into the annular space between the valve and the surrounding casing wall.

This space is designed to be filled by an annular valve seat 17, in-the normal position ofjthe parts last referred to, in -which such central. weighted valve occupies its lowermost position, and saidlannular valve seat member is disposed to close the lateral orifices .16 therein. This seat is beveledj above and below so that its inner face is of relatively narrow width, and it is adapted to be adjustedto occupy various positions vertically in thecasing, by a pin 18 projecting, through an'inclined slot 19 in the wall of the case (see- Fig. {1) to which arod 20 is connected for the purpose of. operation. The low'enportion of ductlO is constricted and formedwith an integral valveseat 21 100 adaptedto cooperate with avalve 22011 the lower end of'an elongated stem 23,:the upper end of whichisattached to thecentral weighted valve 12,'such stemtpassing centrally through the nozzle ll and' having suf- 105 ficient' clearancekto allow the fuel to escape into the radial slots 16 in such central valve, as. previously] described: Projecting. from the valve 22': is a needle-like extension 24 adapted to project within the constricted 110 as a needle valve, permitting an increase in flow of fuel as the valve is raised higher and higher.

Loosely surrounding the intermediate portion of the valve stem 23 and lying in the corresponding intermediate, enlarged por tion of the fuel duct, isa cylindrical member 25, that is designed to rest of its own weight. inthe position shown, said member being formed to leave a slight clearance,- not only between it and the conical bottom of the duct, but also between itand the side wall of such duct, through which clearance the fuel can pass from the supply connection 26, upon raisingvalve 22, to the nozzle 11. 7 Such enlarged portion of the fuel duct is-in turn surrounded by a casing 27, through which heated gases from the exhaust of the engine are designed to be passed in the direction indicated by the arrows,so as to maintain this portion of the duct at a relatively high temperature. The fuel, it will be observed, is caused to pass in a more or less thinfilm directly in contact with such heated wall, and so ,be heated to a point where its vaporization willbe materially facilitated upon its being discharged in the upper 'portion of, the carbureter.

In the construction illustrated inFig. 1, the connection 26, through which fuel is supplied to duct 11, is, directlyattached to .thelatter, but the arrangement illustrated in Fig. 3is preferable, consisting of a hollow sleeve 28 that is clamped between the, bottom of the duct and a polygonal "head 29 on the end of a tubular member 30, threaded in the lower portion of the duct. The construction 7 is such, that,'upon rotating the member 30,

p when the valve is raised. In order to in so as to slightly loosen the same" in the casing, the sleeve 28 maybe left in any desired position with respect to the casing. The

member 30serves the further purpose of providing an upwardly facing seat 31, upon which normally rests a weighted valve in the form ofaplunger 32, having its lower end fitted to such seat, and itssides cut away to allow a relatively'free passage of the fuel sure such; seating of this valve, the lower end of r the extension 24 ofthe valve22, that controls the fuel supply, is adapted to engage with a stop 33 resiliently supported in said plunger. r l

' V The operation of the carbureter may now be conveniently reviewed, Assuming the is of course shut oif by valve 22, as well as position of the parts to be'as in :1, it being understood that theannular valve seat .17 willfbe initially adjusted as desired within the range of the slot 19, the fuel supply 1 the 7 air su ly past the central weighted valve 12.

pon starting the engine, however, the suction, as regulated by the throttle valve 4:, will immediately lift such air valve,

and thus the supplemental fuel control valve,

so as to respectively open the annular air' passage, and lift the supplementalivalve sufficiently to permit a slight flow of. fuel through the nozzle 11 and its discharge by way of the radial passages in the, air valve 16,, As the suction effect of the'engine increases, it'will lift the air valvehigher and higher, and-correspondingly raise the supplemental valve with its tapered extension,

so as to admit an increasing amount of. fuel.

The effect of raising the annular valve or valveseat 17 will obviously be to require the valve .member 12 to be raised that much higher before the carbu'reter. begins to function, with? the resultthat a correspondingly" richer mixture is produced, due to the fact that valve 22v controlling the fuel supply has been raised to acorresponding degree.

It willbebbservcd, however, that the adj ustment ofvalve seat 17, which cooperates with said valve 12 to closethe annular space be-' tween the nozzle and thesurrounding casing,wall,'does not affect the normal position of said valve 12, nor ofthe fuel control valve 22. on the contrary, the latter remains seatedat all times until the engine is actually started, and the suction ofithe engine 7 raises the valve 12.v This capacity for movement of the valve seat 1 wholly independent of valve 12, takes on particular significance where, as in the illustrated con struction, no' float valve 'for controlling the fuel supply is intended to be'utilizedh Other modes ofapplying the principle of our invention. may be employed instead of regards the. mechanism herein disclosed, provided themeans stated by any of the following claims or the equivalent of such stated means be employed.

We therefore particularly point distinctly claim as our invention:-.

out and 1.'In a device of the, character described, the combination of a tubular casing having an air inlet'jopening a fuel supply -dllCt'Wlth a nozzle risingcentrally within said casing;

an annular, vertically fadjustablevalve seat fitted within said casing; and a central, verticallyf reciprocable valve slidably fitting within saidannular valve seat and adapted said seatbeing' adjustable without affecting the normal position of said valve and the latter being recessed in its under face .to fit around said nozzle and having, radial .12 to be raised by the suction. of the engine,"

110 the one explained, change being made as I i discharge passages communicating with such recess.

2. In a device of the character described, the combination of a tubular casing having an air inlet opening; a fuel supply duct with a nozzle rising centrally within said casing; an annular, vertically reciprocable valve seat fitted within said casing; a central, vertically reciprocable valve slidably fitting within said annular valve seat and adapted to be raised by the suction of the engine, said seat being adjustable without affecting the normal position of said valve and the latter being recessed in'its under face to fit aroundsaid nozzle and having radial discharge passages communicating with such recess; and a fuel-control valve attached to said valve.

3. In a device of the character described, the combination of a tubular casing having an air inlet opening; a fuel sup 1y duct with a nozzle rising centrally within said casing, said duct having an orifice near its lower end; a vertically reciprocable valve fitted around such nozzle and adapted to be raised by the suction of the engine; a valvemember attached to said reciprocable valve and adapted to project through the orifice at the bottom of said duct; and a weighted valve in said duct below said valve-member normally actuated by gravity to close said duct, said valve-member being adapted to engage with said weighted valve to assist in holding the same closed.

4. In a device of the character described, the combination of a tubular casing having an air inlet opening; a fuel sup ly duct with a nozzle rising centrally within said casing, said duct having an orifice near its lower end; an annular, vertically adjustable valve seat fitted within said casing; a central vertically reciprocable valve fitted within said annular valve seat and adapted to be raised by the suction of the engine, said central valve being recessed in its under face to fit around said nozzle and having radial discharge passages communicating with such recess; a valve-member attached to said central valve and adapted to project through the orifice at the bottom of said duct; and a weighted valve in said duct below said valve-member normally actuated by gravity to close said duct, said valvemember being adapted to engage with said weighted valve to assist in holding the same closed. i

5. In a device of the character described, the combination of a tubular casing'having an air inlet opening; a fuel supply duct rising centrally within said casing; a chamber, connected with the engine exhaust, surrounding a portion of said duct; a valve and valve seat coperating to substantially close the passage through said casing, said valve seat being externally adjustable and said valve being adapted to be raised by the suction of the engine; and a second valve connected to be operated by said first valve and adapted to control the supply of fuel through said duct from a point below said chamber. v

6. In a device of the character described, the combination of a tubular casing having an air inlet opening; a fuel supply duct with a 'nozzle rising centrally within said casing, said duct having an intermediate enlarged portion and a valve seat near its JAMES J. TRACY. LAWRENCE H. MORSE. 

